Corsa NPP vs. Flowmaster NPP

swisstyphoon · 09-02-2020, 08:39 AM

Which one of the two axleback systems has a deeper tone?
And which one has less pop, when letting off the throttle?

KingLT1 · 09-02-2020, 09:22 AM

Probably not going to help much, butI have yet to hear of anybody around here that bought the Corsa NPP. Corsa is known for having a higher pitch to the exhaust note. That being said I don't think there is a exhaust with a deeper tone then the Flowmaster NPP that I have heard. With the valves open you get a fair amount of pops on decel if you down shift and keep the rpm up higher. With the valves closed it it's pretty civil all around. My only gripe with it is the valves do not seal perfect when closed and you get a little hiss. Not a huge issue and for the money it's overall a pretty good exhaust that is made well.

swisstyphoon · 09-02-2020, 11:17 AM

Quote:

Originally Posted by KingLT1

Probably not going to help much, butI have yet to hear of anybody around here that bought the Corsa NPP. Corsa is known for having a higher pitch to the exhaust note. That being said I don't think there is a exhaust with a deeper tone then the Flowmaster NPP that I have heard. With the valves open you get a fair amount of pops on decel if you down shift and keep the rpm up higher. With the valves closed it it's pretty civil all around. My only gripe with it is the valves do not seal perfect when closed and you get a little hiss. Not a huge issue and for the money it's overall a pretty good exhaust that is made well.

Thanks for your input King. From the Youtube videos I saw I really like the sound of the Flowmaster. Too bad that the valves are not sealing properly. One side of my stock npp just stardet doing that, and the hiss is already anoying me. This was also a reason to find something to replace stock exhaust. Now, this kinda steers me away from the Flowmaster.

KingLT1 · 09-02-2020, 12:17 PM

I believe a lot of the valve exhausts do the same thing which is why most video clips don't show footage of the exhaust with the valves closed and idling from the rear. If I knew the Corsa didn't do this I would buy it but I am not going to spend 1800.00 to find out. Lol

Mark114 · 09-02-2020, 01:10 PM

Quote:

Originally Posted by swisstyphoon

One side of my stock npp just stardet doing that, and the hiss is already anoying me. This was also a reason to find something to replace stock exhaust. Now, this kinda steers me away from the Flowmaster.

Maybe dealer will fix or replace under warranty? Borla S-type NPP is another popular option.

swisstyphoon · 09-02-2020, 01:28 PM

Quote:

Originally Posted by Mark114

Maybe dealer will fix or replace under warranty? Borla S-type NPP is another popular option.

Unfortunately we have no warranty on the ZL1 here in Europe, the car has to be in the US to be covered..

swisstyphoon · 09-02-2020, 01:31 PM

Quote:

Originally Posted by KingLT1

I believe a lot of the valve exhausts do the same thing which is why most video clips don't show footage of the exhaust with the valves closed and idling from the rear. If I knew the Corsa didn't do this I would buy it but I am not going to spend 1800.00 to find out. Lol

Yeah that would be a pricey test! Lol
The black tip option is even worse. Over $2000

z28pat · 09-02-2020, 08:01 PM

The corsa sounds awesome in the video and The black tips look great , but I’m with the others , it’s over $2000 for some noise. I like the noise and want the noise but I want it closer to $1500

swisstyphoon · 09-05-2020, 09:30 AM

Looks like Corsa has their own problems with the valves...

https://youtu.be/2bqTdCL0tJM

KingLT1 · 09-05-2020, 05:01 PM

Yea the Flowmaster is much better then that.

97cavy22 · 09-19-2020, 02:18 PM

I installed the flowmaster NPP about two weeks ago. In track mode it sounds amazing. VERY deep, pretty loud without being crazy loud. It was the exact sound I was looking for.

The valves don't seal great when in stealth mode, so it doesn't sound great with them closed. Slight hiss/rattle I really only put it in stealth when coming down my street, so honestly, who cares what it sounds like. The car gets quiet (pretty big difference between stealth and track) to keep the neighbors happy so it's doing it's job. You also don't hear any of that hiss/rattle when you are driving, it's just from outside the car.

I don't like the sound of Corsa or Borla to be honest. Too high pitched for my taste. The AWE's sound most similar to flowmaster but do not offer NPP, so that's why I went flowmaster.

KingLT1 · 09-19-2020, 03:43 PM

Quote:

Originally Posted by 97cavy22

I installed the flowmaster NPP about two weeks ago. In track mode it sounds amazing. VERY deep, pretty loud without being crazy loud. It was the exact sound I was looking for.

The valves don't seal great when in stealth mode, so it doesn't sound great with them closed. Slight hiss/rattle I really only put it in stealth when coming down my street, so honestly, who cares what it sounds like. The car gets quiet (pretty big difference between stealth and track) to keep the neighbors happy so it's doing it's job. You also don't hear any of that hiss/rattle when you are driving, it's just from outside the car.

I don't like the sound of Corsa or Borla to be honest. Too high pitched for my taste. The AWE's sound most similar to flowmaster but do not offer NPP, so that's why I went flowmaster.

Same here. For the price I don't think you can do better then the Flowmaster NPP.

09-02-2020, 08:39 AM	#1
swisstyphoon Former GM Technician Drives: 2018 ZL1 A10, 06 Silverado Duramax Join Date: Sep 2009 Location: Switzerland Posts: 341	Corsa NPP vs. Flowmaster NPP Which one of the two axleback systems has a deeper tone? And which one has less pop, when letting off the throttle? __________________ 2018 Camaro ZL1 A10 Rotofab Big Gulp, Nick Williams 103, Magnuson 2650, 9.17" (14%) lower, 90mm upper, Vengeance Racing Heads (LME) Cam Package (Cammotion Stage 1), Johnson Lifters, JMS Voltage Booster, Lingenfelter high flow check valve, BBK shorty headers, Custom 2.75" down pipes, Gesi Gen2 high flow cats, MM catch can 791whp, 772ft-lbs SAE Just added 30% XDI Injectors, LPE big bore hpfp, Flex fuel. Elite tuning, results coming soon. 2006 Silverado Duramax Diesel MPI Compound Turbo 40% over Injectors Efi Live DSP5 Tuning Follow me on Instagram: Swisstyphoon1980

09-02-2020, 09:22 AM	#2
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,787	Probably not going to help much, butI have yet to hear of anybody around here that bought the Corsa NPP. Corsa is known for having a higher pitch to the exhaust note. That being said I don't think there is a exhaust with a deeper tone then the Flowmaster NPP that I have heard. With the valves open you get a fair amount of pops on decel if you down shift and keep the rpm up higher. With the valves closed it it's pretty civil all around. My only gripe with it is the valves do not seal perfect when closed and you get a little hiss. Not a huge issue and for the money it's overall a pretty good exhaust that is made well. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

09-02-2020, 12:17 PM	#4
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,787	I believe a lot of the valve exhausts do the same thing which is why most video clips don't show footage of the exhaust with the valves closed and idling from the rear. If I knew the Corsa didn't do this I would buy it but I am not going to spend 1800.00 to find out. Lol __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

09-05-2020, 09:30 AM	#9
swisstyphoon Former GM Technician Drives: 2018 ZL1 A10, 06 Silverado Duramax Join Date: Sep 2009 Location: Switzerland Posts: 341	Looks like Corsa has their own problems with the valves... https://youtu.be/2bqTdCL0tJM __________________ 2018 Camaro ZL1 A10 Rotofab Big Gulp, Nick Williams 103, Magnuson 2650, 9.17" (14%) lower, 90mm upper, Vengeance Racing Heads (LME) Cam Package (Cammotion Stage 1), Johnson Lifters, JMS Voltage Booster, Lingenfelter high flow check valve, BBK shorty headers, Custom 2.75" down pipes, Gesi Gen2 high flow cats, MM catch can 791whp, 772ft-lbs SAE Just added 30% XDI Injectors, LPE big bore hpfp, Flex fuel. Elite tuning, results coming soon. 2006 Silverado Duramax Diesel MPI Compound Turbo 40% over Injectors Efi Live DSP5 Tuning Follow me on Instagram: Swisstyphoon1980

09-05-2020, 05:01 PM	#10
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,787	Yea the Flowmaster is much better then that. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

09-02-2020, 08:01 PM	#8
z28pat Drives: 2002 z28, 2018 2ss 1LE Join Date: Sep 2012 Location: Parrish, Florida Posts: 834	The corsa sounds awesome in the video and The black tips look great , but I’m with the others , it’s over $2000 for some noise. I like the noise and want the noise but I want it closer to $1500

09-19-2020, 02:18 PM	#11
97cavy22 Drives: 2017 Camaro SS Join Date: Sep 2017 Location: Delaware Posts: 61	I installed the flowmaster NPP about two weeks ago. In track mode it sounds amazing. VERY deep, pretty loud without being crazy loud. It was the exact sound I was looking for. The valves don't seal great when in stealth mode, so it doesn't sound great with them closed. Slight hiss/rattle I really only put it in stealth when coming down my street, so honestly, who cares what it sounds like. The car gets quiet (pretty big difference between stealth and track) to keep the neighbors happy so it's doing it's job. You also don't hear any of that hiss/rattle when you are driving, it's just from outside the car. I don't like the sound of Corsa or Borla to be honest. Too high pitched for my taste. The AWE's sound most similar to flowmaster but do not offer NPP, so that's why I went flowmaster.

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